WARNING: The information on these pages
is intended for owners of Stealth rifles to improve their rifles within the laws
of their home countries. It is not the intention of the author to promote the
illegal modification of air rifles nor to encourage such modification.

In the UK, a non Firearms certificated
air rifle may not exceed a muzzle velocity of 12 foot pounds of energy at the
muzzle. This is measured using a Chronograph, a small device that measures
projectile velocity. You MUST have one of these if you are going to modify your
rifle.